Air conditioner

ABSTRACT

An air conditioner includes a main body that includes a suction port and an outlet port, wherein: the main body includes a front surface, a back surface, an upper surface, a lower surface, and a pair of side surfaces; the suction port is formed on any of the front surface, the upper surface, and the side surfaces; the outlet port is formed on at least the lower surface; an outlet air channel is upstream from the outlet port; a side of the outlet air channel near the front surface is formed by a diffuser; and the diffuser includes a portion that diverges from an imaginary straight line that constitutes a direction of extension of an upstream portion of the diffuser increasingly toward a downstream end of the diffuser in a side view.

CROSS REFERENCE TO RELATED APPLICATION

This application is a U.S. national stage application of PCT/JP2015/072226 filed on Aug. 5, 2015, which claims priority to International Application No. PCT/JP2014/078200 filed on Oct. 23, 2014, the contents of which are incorporated herein by reference.

TECHNICAL FIELD

The present invention relates to an air conditioner.

BACKGROUND

In Patent Literature 1, an air conditioner is disclosed in which a blower fan is included inside a main body, and an outlet air channel that is delimited by wall surfaces is formed downstream from the blower fan. An outlet port is disposed in a downstream portion of the outlet air channel. The outlet port is disposed on a lower surface and a front surface of the main body of the air conditioner.

PATENT LITERATURE

Patent Literature 1: Japanese Patent No. 3872012 (Specification) (See FIG. 3)

An air conditioner that is disposed inside a target space as an indoor unit can expel conditioned air over a wide area of the target space due to an outlet port being disposed on a lower surface of the main body of the air conditioner in question, or so as to span the lower surface and a front surface of the main body.

However, the expulsion load of the air conditioner may change as a result of elapsed service life, for example. At the time of shipment of the air conditioner from the factory (beginning of service life), for example, the expulsion load is a relatively low load, and conditioned air is expelled stably over a wide area from an outlet port that occupies a portion of a lower surface of the main body or a portion of the lower surface and a portion of a front surface of the main body.

When a certain amount of service life has elapsed, on the other hand, ventilation resistance increases due to accumulation of dust, etc., arising, and the expulsion load becomes a relatively high load. If the expulsion load becomes a relatively high load, then the wind speed distribution of the air that is expelled from the blower fan may become unstable, and reverse flow may occur from the outlet port to the blower fan, which ultimately may lead to the formation of condensation. If the outlet port is spread over the lower surface and the front surface of the main body, in particular, then the wind speed distribution of the air that is expelled from the blower fan becomes even more unstable.

SUMMARY

The present invention has been conceived in light of the above and an object of the present invention is to provide an air conditioner that can reduce formation of condensation while having an outlet port that occupies a portion of a lower surface of a main body or a portion of the lower surface and a portion of a front surface of the main body.

In order to achieve the objective that is described above, an air conditioner according to the present invention includes: a main body that includes a suction port and an outlet port; a blowing portion that is disposed inside the main body; and a heat exchanging portion that is disposed inside the main body, wherein: the main body includes a front surface, a back surface, an upper surface, a lower surface, and a pair of side surfaces; the suction port is formed on any of the front surface, the upper surface, and the side surfaces; the outlet port is formed on at least the lower surface; an outlet air channel is upstream from the outlet port; a side of the outlet air channel near the front surface is delimited by a diffuser; and the diffuser includes a portion that diverges from an upstream portion imaginary straight line that constitutes a direction of extension of an upstream portion of the diffuser increasingly toward a downstream end of the diffuser when viewed from a side.

The air conditioner according to the present invention can reduce formation of condensation while having an outlet port that occupies a portion of a lower surface of a main body or a portion of the lower surface and a portion of a front surface of the main body.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a diagram that shows an installed state of an air conditioner that represents Embodiment 1 according to the present invention, when viewed from inside a room;

FIG. 2 is a diagram that shows an internal construction of the air conditioner according to Embodiment 1 from a side;

FIG. 3 is a diagram that relates to Embodiment 1, and that shows portions in a vicinity of a diffuser and a downstream portion of a guiding wall enlarged;

FIG. 4 is a graph that shows a relationship between angle α that is formed between an upstream portion imaginary straight line S1 and a downstream portion imaginary straight line S2 and ΔSPL (a difference in sound level compared to when angle α that is formed by the imaginary lines S1 and S2 is zero degrees, i.e., they are connected in a straight line);

FIG. 5 is a diagram that relates to Embodiment 2 according to the present invention, that has similar features to FIG. 2;

FIG. 6 is a diagram that relates to Embodiment 3 according to the present invention, that has similar features to FIG. 3;

FIG. 7 is a diagram that relates to Embodiment 3 according to the present invention, that has similar features to FIG. 3; and

FIG. 8 is a diagram that relates to Embodiment 4 according to the present invention, that has similar features to FIG. 2.

DETAILED DESCRIPTION

Preferred embodiments of the air conditioner (indoor unit) according to the present invention will now be explained based on the accompanying drawings. Moreover, in the figures, identical numbering indicates identical or corresponding portions. Furthermore, existing outdoor units can be used.

Embodiment 1

FIG. 1 is an installation schematic diagram that shows an air conditioner in Embodiment 1 according to the present invention when viewed from a room. FIG. 2 is a diagram that shows an internal construction of the air conditioner according to Embodiment 1 from a side. Moreover, FIG. 2 shows a state of the air conditioner during a horizontal blowing operation (during horizontal blowing).

As shown in FIG. 1, an air conditioner (an indoor unit) 100 includes a main body 1 that functions as a case. The air conditioner 100 is an example of a wall-mounted type, and is supported by a wall 11 a of a room 11 that constitutes an air conditioning target space. Moreover, the air conditioner according to the present invention is not limited to being installed in a room of an ordinary house, and may be installed in a room or storeroom of a building in a complex, for example.

Furthermore, the air conditioner according to the present invention is not a “ceiling-recessed” air conditioner, but is an air conditioner in which a back surface of the main body is placed in contact with or close to a wall surface that delimits the air conditioning target space (a wall rather than a ceiling or a floor), and in which a front surface of the main body is oriented toward the air conditioning target space in question. To put it another way, the air conditioner according to the present invention does not have a suction port and an outlet port in a common plane as in ceiling-embedded types, and may be disposed alongside a wall surface that delimits the air conditioning target space, away from a central portion of the air conditioning target space.

The main body 1 is an approximately rectangular parallelepiped housing. Specifically, the main body 1 includes: a back surface 1 c that faces the wall 11 a of the room 11; a front surface 1 a that is on an opposite side from the back surface 1 c; an upper surface 1 b; a lower surface 1 d; and a pair of left and right side surfaces 1 e.

In the air conditioner according to the present invention, at least one suction port is formed on any of the front surface, the upper surface, and the side surfaces of the main body, and an outlet port is formed so as to span at least a portion of the front surface of the main body and at least a portion of the lower surface. A specific example of the present embodiment will be further explained.

A front surface grill 6 is mounted to the front surface la of the main body 1. The front surface grill 6 is formed so as to have a flat surface that is flat in a vertical direction (a height direction) and in a lateral direction (a width direction). A first suction port 2 a for sucking indoor air into the air conditioner 100 has an opening in a central portion in a main body height direction of the front surface grill 6. The suction port 2 a extends along the front surface grill 6 in the width direction, and has an opening that has a length that corresponds to a length in a width direction of at least a heat exchanger 7 (described below). Moreover, the opening of the suction port 2 a may be longer than the length in the width direction of the heat exchanger 7. An airflow guiding wall 6 a is disposed downstream from the suction port 2 a. A front surface side of a flow channel downstream from the suction port 2 a is formed by a rear surface of the front surface grill 6, and a back surface side of the flow channel downstream from the suction port 2 a is formed by the airflow guiding wall 6 a. The airflow guiding wall 6 a extends horizontally from the front surface grill 6 toward the back surface above the suction port 2 a, then bends partway along and extends downward. In other words, the airflow guiding wall 6 a is formed so as to have an L-shaped cross section that has: a horizontal surface 6 a 1 that extends so as to be perpendicular to the flat surface of the front surface grill 6; and a downward surface 6 a 2 that extends parallel to the flat surface of the front surface grill 6. Furthermore, the suction port 2 a is disposed within a range H below an upper end of a crossflow fan 8 (described below) and above than an upper end of a stabilizer 9 (described below) in the main body height direction.

A grill-shaped second suction port 2 b for sucking indoor air into the air conditioner 100 is formed on an upper surface 1 b of the main body 1.

An outlet port 3 for supplying conditioned air inside a room is formed on the lower surface 1 d and the front surface 1 a of the main body 1. The outlet port 3 is formed so as to span the lower surface 1 d and the front surface 1 a of the main body 1. To put it another way, the outlet port 3 is spread continuously so as to occupy a region on a front portion of the lower surface 1 d of the main body 1 and a region on a lower portion of the front surface 1 a of the main body 1. The outlet port 3 has an opening only on the lower surface 1 d and the front surface 1 a of the main body 1, and does not have an opening on the upper surface 1 b, the back surface 1 c, or the left and right side surfaces 1 e.

A crossflow fan (a blowing portion) 8 that has an impeller 8 a, and a guiding wall 10 are installed inside the main body 1. The crossflow fan 8 is disposed between a suction flow channel E1 and an expulsion flow channel E2, and sucks air in through the suction ports 2 a and 2 b, and expels the air out through the outlet port 3. The guiding wall 10 extends continuously downward from behind the crossflow fan 8, and directs the air that has been expelled from the crossflow fan 8 to the outlet port 3.

Also installed inside the main body 1 are: a filter (a ventilation resisting body) 5 that removes dust from the air that is sucked in through the suction ports 2 a and 2 b; a heat exchanger (a heat exchanging portion and ventilation resisting body) 7 that generates conditioned air by transmitting warmth or coldness of a refrigerant to the air; and a stabilizer 9 that partitions the suction flow channel E1 and the expulsion flow channel E2.

Together with a diffuser 3 a that is formed on a lower surface of the stabilizer 9, the guiding wall 10 forms part of the expulsion flow channel E2 that constitutes the outlet air channel 3 b. Specifically, the outlet air channel 3 b on a side near the front surface 1 a of the main body 1 is delimited by the diffuser 3 a, and the outlet air channel 3 b on a side near the back surface 1 c of the main body 1 is delimited by the guiding wall 10, the outlet air channel being formed by the facing diffuser 3 a and guiding wall 10. The guiding wall 10 forms a spiral surface from the crossflow fan 8 to the outlet port 3.

A filter 5 is formed so as to have a mesh shape, for example, and removes dust from the air that is sucked in through the suction ports 2 a and 2 b. The filter 5 is disposed downstream from the suction ports 2 a and 2 b and upstream from the heat exchanger 7 within the air channel from the suction port 2 a and 2 b to the outlet port 3. The filter 5 extends forward from above the heat exchanger 7.

The heat exchanger 7 (the indoor heat exchanger) functions as an evaporator to cool the air during cooling operation, and functions as a condenser (a radiator) to warm the air during heating operation. Within the air channel from the suction ports 2 a and 2 b to the outlet port 3 (a central portion inside the main body 1), this heat exchanger 7 is disposed downstream from the filter 5 and upstream from the crossflow fan 8. Moreover, in FIG. 2, the shape of the heat exchanger 7 is a shape that surrounds a front portion and an upper portion of the crossflow fan 8, but this is merely one example, and is not particularly limited thereto.

The heat exchanger 7 is connected to an outdoor unit that may have conventional features such as including a compressor, an outdoor heat exchanger, and a throttling apparatus, etc., to constitute a refrigeration cycle. Furthermore, a cross fin fin-and-tube heat exchanger that is constituted by a heat exchanging tube and a plurality of fins, for example, can be used as the heat exchanger 7.

A vertical wind directing vane 4 a and lateral wind directing vanes 4 b are disposed in the outlet air channel 3 b. The lateral wind directing vanes 4 b are disposed pivotably between the vertical wind directing vane 4 a and the crossflow fan 8. The vertical wind directing vane 4 a adjusts a vertical component of the air that is blown out from the crossflow fan 8, and the lateral wind directing vanes 4 b adjust the direction of the air that is blown out from the crossflow fan 8 to the left and right. The vertical wind directing vane 4 a and the lateral wind directing vanes 4 b are driven so as to be pivoted independently from each other.

The vertical wind directing vane 4 a has a convex shape in which an upper surface and a lower surface of the vertical wind directing vane 4 a both protrude downward relative to attitude during a horizontal blowing operation.

The stabilizer 9 partitions the suction flow channel E1 and the expulsion flow channel E2 as described above, and is disposed below the heat exchanger 7 as shown in FIG. 2. The suction flow channel E1 is positioned above the stabilizer 9, and the expulsion flow channel E2 is positioned below the stabilizer 9.

The stabilizer 9 has: a tongue portion 9 a that separates the suction flow channel E1 and the expulsion flow channel E2, a draining pan 9 b that temporarily stores water from droplets that drip down from the heat exchanger 7; and the diffuser 3 a. The diffuser 3 a is formed on the lower surface of the stabilizer 9 as described above, and functions as an upper wall surface (a front surface-side wall surface) of the outlet air channel 3 b of the outlet port 3.

FIG. 3 is a diagram that relates to Embodiment 1, and that shows portions in a vicinity of a diffuser and a downstream portion of a guiding wall enlarged. As shown in FIGS. 2 and 3, an upstream portion 3 a 1 of the diffuser 3 a extends in a direction that is similar or identical to the direction that the downstream portion 10 a of the guiding wall 10 extends, such that the upstream portion 3 a 1 of the diffuser 3 a lines up approximately parallel to the downstream portion 10 a of the guiding wall 10 when viewed from a side.

The upstream portion 3 a 1 of the diffuser 3 a has a rectilinear portion in a side view. In the side view in FIG. 2, if a direction of extension of the rectilinear portion of the upstream portion 3 a 1 of the diffuser 3 a is an upstream portion imaginary straight line S1, then a front portion of that upstream portion imaginary straight line S1 extends so as to intersect with an imaginary straight line F that extends from the front surface la of the main body 1. A downstream portion 3 a 2 of the diffuser 3 a extends so as to diverge downward from the upstream portion imaginary straight line S1 increasingly toward a downstream end of the downstream portion 3 a 2. In other words, the diffuser 3 a has a portion that diverges from the upstream portion imaginary straight line S1, which constitutes a direction of extension of the upstream portion 3 a 1 of the diffuser 3 a, increasingly toward a downstream end of the diffuser 3 a in a side view. In the example that is depicted in FIG. 2, in particular, the diffuser 3 a is configured so as not to have any portions that are positioned above the upstream portion imaginary straight line S1 of the upstream portion 3 a 1 of the diffuser 3 a.

The downstream portion 3 a 2 of the diffuser 3 a has a rectilinear portion when viewed from a side. If a direction of extension of the rectilinear portion of the downstream portion 3 a 2 of the diffuser 3 a is a downstream portion imaginary straight line S2, then the downstream portion imaginary straight line S2 is lower than the upstream portion imaginary straight line S1. The diffuser 3 a is bent or curved at a portion 3 a 3 of the diffuser 3 a that is positioned between the upstream portion 3 a 1 and the downstream portion 3 a 2.

In addition, a length A of the rectilinear portion of the downstream portion 3 a 2 of the diffuser 3 a that is shown in FIG. 3 is a length that is greater than or equal to half of a length B of a chord that joins the upstream end 4 a 1 and the downstream end 4 a 2 of the vertical wind directing vane 4 a.

It is preferable for the angle α that is formed between the upstream portion imaginary straight line S1 and the downstream portion imaginary straight line S2 to be 5 degrees through 40 degrees. FIG. 4 is a graph that shows a relationship between angle α that is formed between an upstream portion imaginary straight line S1 and a downstream portion imaginary straight line S2 and ΔSPL. ΔSPL is a difference in sound level compared to when angle α that is formed by the upstream portion imaginary straight line S1 and the downstream portion imaginary straight line S2 is zero degrees, i.e., they are connected in a straight line. As can clearly be seen from the graph in FIG. 4, there is a noise reducing effect in a range in which the angle α that is formed between the upstream portion imaginary straight line S1 and the downstream portion imaginary straight line S2 is 5 degrees through 40 degrees. When the angle α that is formed between the upstream portion imaginary straight line S1 and the downstream portion imaginary straight line S2 is less than 5 degrees, on the other hand, a soundproofing effect cannot be expected at the downstream portion 3 a 2 of the diffuser 3 a, and when the angle α exceeds 40 degrees, although soundproofing effect is increased, at greater than or equal to that, the demerit of an increase in noise due to the outlet port being narrowed and ventilation resistance increasing is more pronounced, and in an overall evaluation of noise, noise deterioration increases. Consequently, it is preferable for the angle α that is formed between the upstream portion imaginary straight line S1 and the downstream portion imaginary straight line S2 to be 5 degrees through 40 degrees, whereby noise from the fan that is deflected by the guiding wall is deflected below the unit due to the wall surface at the downstream end of the diffuser, suppressing noise emission toward the front surface side of the air conditioner, and enabling noise reduction to be achieved.

In an air conditioner according to the present Embodiment 1 that is configured in the above manner, because a diffuser has a portion that diverges from an upstream portion imaginary straight line that is a direction of extension of an upstream portion of the diffuser increasingly downstream thereon, flow of expelled air along a wall surface in a downstream portion of the diffuser (the downstream portion of the diffuser) can be accelerated. Because of that, reverse flow from an outlet port to a blower fan can be reduced even during relatively heavy expulsion loads such as ventilation resistance increasing due to dust depositing on a filter that is disposed near suction ports, for example. In other words, reverse flow from the outlet port to the blower fan can be reduced, and formation of condensation can also be reduced even during relatively heavier expulsion loads than immediately after factory shipment while still being able to expel conditioned air over a wide area of a target space due to the outlet port spanning across a front surface and a lower surface of a main body.

Because an outlet air channel is constituted by a diffuser and a guiding wall that face each other, flow is stabilized by ensuring a flow channel that functions as a duct, enabling air to be blown stably with respect to changes in environment such as changes in ventilation resistance due to upper and lower flaps being movable, and changes in ventilation resistance due to dust blockage on a filter, etc.

Another advantage is that noise from the fan that is reflected by the guiding wall is actively reflected below the main body of the air conditioner by the downstream portion of the diffuser, suppressing noise emission toward a front surface of the air conditioner, and enabling noise reduction.

By making a length A of the rectilinear portion of the downstream portion 3 a 2 of the diffuser 3 a a length that is greater than or equal to half of a length B of a chord that joins the upstream end 4 a 1 and the downstream end 4 a 2 of the vertical wind directing vane 4 a, flow between the diffuser 3 a and the vertical wind directing vane 4 a is stabilized, enabling controllability of wind direction to be improved.

In addition, by forming the front surface grill 6 so as to be vertically flat, dust is less likely to attach to the surface of the front surface grill 6, enabling it to be kept clean. Furthermore, by forming the front surface grill 6 so as to be laterally flat, air channel depth is identical across a width direction of the main body 1, enabling the crossflow fan 8 and the heat exchanger 7 to be mounted inside the main body 1 at a high density, thereby enabling fan blowing performance and heat exchanging performance to be improved.

By making the airflow guiding wall 6 a so as to have an L-shaped cross section, only the downward surface 6 a 2 is visible inside the air intake apertures 2 a in a front view, improving decorative design because a flat surface is visible at a deepest position in a depth direction. Because a buffer area for suction flow is formed at a corner portion between the horizontal surface 6 a 1 and the downward surface 6 a 2, suction air is not parallel to a wall surface, making dust less likely to attach. Furthermore, if noise from the crossflow fan 8, etc., that is generated inside the main body 1 propagates out of the suction ports 2 a, because the upper surface (the horizontal surface 6 a 1) of the airflow guiding wall 6 a is formed so as to be horizontal, noise that is reflected outside is reduced, enabling reduced noise to be ensured.

In addition, by making an opening of the suction ports 2 a a length that corresponds to a length of a width direction of the heat exchanger 7, the air that has been sucked in through the suction ports 2 a can exchange heat effectively at the heat exchanger 7. Furthermore, if the opening of the suction port 2 a is made longer than the length of the width direction of the heat exchanger 7, then suction pressure loss can be reduced due to the aperture area of the suction ports 2 a being increased.

By disposing the suction ports 2 a within a range H in the main body height direction that is described above, ventilation resistance is reduced because air is sucked in through a position near the crossflow fan 8, improving blowing efficiency. By supplying the air that has been sucked in through the suction ports 2 a to the fan circulating flow, throughflow is stabilized, reducing fluctuations in the amount of blowing and maintaining quality even if changes in load arise due to dust depositing on the filter, or due to differences between heating and cooling. In addition, it is unnecessary to drive the front surface grill 6 to open the suction ports 2 a, making it compact, reducing changes in configuration during operation, and enabling feelings of user discomfort to be suppressed. Furthermore, the front surface grill 6 is a shape that is divided into top and bottom at a central portion in the main body height direction, and because height dimensions are equal on an upper portion side and a lower portion side of the front surface grill 6, and strength is equal on the upper portion side and the lower portion side, making it unlikely to bend, and enabling quality to be maintained.

Embodiment 2

Next, Embodiment 2 of the present invention will be explained using FIG. 5. FIG. 5 is a diagram that relates to Embodiment 2 according to the present invention, that has similar features to FIG. 2. Moreover, Embodiment 2, is similar or identical to Embodiment 1 except for portions that will be explained below.

In the example that is depicted in FIG. 2 relating to Embodiment 1 that is described above, the diffuser 3 a was configured so as not to have any portions that are positioned above the upstream portion imaginary straight line S1 of the upstream portion 3 a 1 of the diffuser 3 a, but the present invention is not limited thereto. Specifically, in the present invention, the diffuser 3 a can be formed such that a portion between the upstream portion 3 a 1 of the diffuser 3 a that determines the upstream portion imaginary straight line S1 and the downstream portion 3 a 2 of the diffuser 3 a that determines the downstream portion imaginary straight line S2 has various shapes. FIG. 5 is one example thereof.

As shown in FIG. 5, the diffuser 3 a has an intermediate portion 3 a 4 between the upstream portion 3 a 1 of the diffuser 3 a that determines the upstream portion imaginary straight line S1 and the downstream portion 3 a 2 of the diffuser 3 a that determines the downstream portion imaginary straight line S2. This intermediate portion 3 a 4 is positioned higher than the upstream portion imaginary straight line S1.

Similar or identical working effects to those in Embodiment 1 can also be achieved using Embodiment 2 or the like, and in particular formation of condensation can be reduced while having an outlet port that occupies a portion of the lower surface and a portion of the front surface of the main body.

Embodiment 3

Next, Embodiment 3 of the present invention will be explained using FIGS. 6 and 7. FIGS. 6 and 7 are diagrams that relate to Embodiment 3 according to the present invention, that have similar features to FIG. 3. Moreover, Embodiment 3, is similar or identical to Embodiments 1 or 2 except for portions that will be explained below. FIGS. 6 and 7 are examples of cases that are configured in a similar or identical manner to Embodiment 1 except for portions that will be explained below.

In the example depicted in FIG. 2 relating to Embodiment 1 that is described above, the upstream portion of the diffuser 3 a and the downstream portion of the guiding wall 10 are in an approximately parallel configuration, but the present invention is not limited thereto. In other words, the present invention may have a configuration in which a distance between an upstream portion of a diffuser and a downstream portion of a guiding wall widens gradually downstream. FIGS. 6 and 7 are examples thereof.

First, in the configuration that is shown in FIG. 6, the direction in which an upstream portion 303 a 1 of a diffuser extends is set so as to be further away from a downstream portion 10 a of a guiding wall 10 toward a downstream end than the direction in which the upstream portion 3 a 1 of the diffuser in the configuration in FIG. 2 of Embodiment 1 that is described above extends. In other words, an outlet air channel in FIG. 6 is wider than the outlet air channel in FIG. 2 on a side near the upstream portion 303 a 1 of the diffuser.

In the configuration that is shown in FIG. 7, the direction in which a downstream portion 310 a of a guiding wall extends is set so as to be further away from an upstream portion 3 a 1 of a diffuser 3 a toward a downstream end than the direction in which the downstream portion 10 a of a guiding wall in the configuration in FIG. 2 of Embodiment 1 that is described above extends. In other words, an outlet air channel in FIG. 7 is wider than the outlet air channel in FIG. 2 on a side near the downstream portion 310 a of the guiding wall.

Similar or identical working effects to those in Embodiment 1 can also be achieved using Embodiment 3 or the like, and in particular formation of condensation can be reduced while having an outlet port that occupies a portion of the lower surface and a portion of the front surface of the main body. Because the distance between the upstream portion of the diffuser and the downstream portion of the guiding wall widens toward a downstream end, the fan expulsion flow is expanded in a vicinity of the fan expulsion region 8 b, and is made uniform in a height direction of the outlet port. As a result thereof, flow is stabilized, and more stable blowing is enabled relative to ventilation resistance increases due to dust blockage of the filter, enabling improvements in quality.

Embodiment 4

Next, Embodiment 4 of the present invention will be explained using FIG. 8. FIG. 8 is a diagram that relates to Embodiment 4 according to the present invention, that has similar features to FIG. 2. Moreover, Embodiment 4, is similar or identical to Embodiment 1 except for portions that will be explained below.

In the example depicted in FIG. 2 relating to Embodiment 1 that is described above, an air conditioner 100 is shown in which an outlet port 3 is formed so as to span at least a portion of the front surface la of a main body 1 and at least a portion of a lower surface 1 d, but the present invention is not limited thereto. In other words, the present invention can also be applied to an air conditioner in which the outlet port 3 is formed only on the lower surface 1 d of the main body 1, and similar or identical working effects can be achieved. FIG. 8 is one example thereof.

As shown in FIG. 8, an outlet port 3 for supplying conditioned air inside a room is formed on the lower surface 1 d of the main body 1. The outlet port 3 has an opening only on the lower surface 1 d of the main body 1, and does not have an opening on the front surface 1 a, the upper surface 1 b, the back surface 1 c, or the left and right side surfaces 1 e. A front surface grill 6 that is equal in height to the main body height direction is mounted to the front surface la of the main body 1. Moreover, in FIG. 8, an example is shown in which a vertical wind directing vane 4 a is constituted by two members, but it may be constituted by a single member in a similar or identical manner to Embodiment 1.

Similar or identical working effects to those of Embodiment 1 above can also be achieved using Embodiment 4 or the like.

Finally, the contents of the present invention have been explained in detail with reference to preferred embodiments, but it is self-evident that various modified configurations can be adopted by any person skilled in the art based on the basic technical concepts and teachings of the present invention. 

1-9. (canceled)
 10. An air conditioner comprising: a main body that comprises a suction port and an outlet port; a blowing portion that is disposed inside said main body; and a heat exchanging portion that is disposed inside said main body, wherein: said main body includes a front surface, a back surface, an upper surface, a lower surface, and a pair of side surfaces; said suction port is formed on any of said front surface, said upper surface, and said side surfaces; said outlet port is formed on at least said lower surface; an outlet air channel is upstream from said outlet port; a side of said outlet air channel near said front surface is delimited by a diffuser; said diffuser comprises a portion that diverges from an upstream portion imaginary straight line that constitutes a direction of extension of an upstream portion of said diffuser increasingly toward a downstream end of said diffuser when viewed from a side; a stabilizer is disposed below said heat exchanging portion, said diffuser being formed on a lower surface of said stabilizer; said suction port is formed on said front surface of said main body and being disposed within a range that is lower than an upper end of said blowing portion and higher than an upper end of said stabilizer in a height direction of said main body; an airflow guiding wall is disposed downstream from said suction port; and said airflow guiding wall has an L-shaped cross section comprising: a horizontal surface that extends horizontally toward a back surface side of said main body; and a downward surface that extends downward.
 11. The air conditioner according to claim 10, wherein said outlet port is formed so as to span said front surface and said lower surface.
 12. The air conditioner according to claim 10, wherein: a vertical wind directing vane that adjusts a vertical component of direction of expulsion of air that is blown out from said blowing portion is disposed in said outlet air channel; and a length of a rectilinear portion of a downstream portion of said diffuser is a length that is greater than or equal to half of a length of a chord that joins an upstream end and a downstream end of said vertical wind directing vane when viewed from a side.
 13. The air conditioner according to claim 10, wherein: a side of said outlet air channel near said back surface is delimited by a guiding wall, said outlet air channel being configured by said diffuser and said guiding wall, which face each other.
 14. The air conditioner according to claim 13, wherein a distance between an upstream portion of said diffuser and a downstream portion of said guiding wall widens toward a downstream end.
 15. The air conditioner according to claim 10, wherein an angle α that is formed between an upstream portion imaginary straight line S1 and a downstream portion imaginary straight line S2 is 5 degrees through 40 degrees when viewed from a side, where said upstream portion imaginary straight line S1 is a direction of extension of a rectilinear portion of an upstream portion of said diffuser and said downstream portion imaginary straight line S2 is a direction of extension of a rectilinear portion of a downstream portion of said diffuser.
 16. The air conditioner according to claim 10, wherein said suction port is formed on said front surface of said main body and has an opening that has a length that corresponds to a length in a width direction of at least said heat exchanging portion. 